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Can there be a time-temperature graph as follows? Justify your answer. - Mathematics

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प्रश्न

Can there be a time-temperature graph as follows? Justify your answer.

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औचित्य

उत्तर

This cannot be a time-temperature graph since different temperatures at the same time are not possible. 

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 15: Introduction to Graphs - Exercise 15.1 [पृष्ठ २३९]

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एनसीईआरटी Mathematics [English] Class 8
पाठ 15 Introduction to Graphs
Exercise 15.1 | Q 7.3 | पृष्ठ २३९

संबंधित प्रश्‍न

The following line graph shows the yearly sales figures for a manufacturing company.

  1. What were the sales in (i) 2002 (ii) 2006?
  2. What were the sales in (i) 2003 (ii) 2005?
  3. Compute the difference between the sales in 2002 and 2006.
  4. In which year was there the greatest difference between the sales as compared to its previous year?

For an experiment in Botany, two different plants, plant A and plant B were grown under similar laboratory conditions. Their heights were measured at the end of each week for 3 weeks. The results are shown by the following graph.

  1. How high was Plant A after (i) 2 weeks (ii) 3 weeks?
  2. How high was Plant B after (i) 2 weeks (ii) 3 weeks?
  3. How much did Plant A grow during the 3rd week?
  4. How much did Plant B grow from the end of the 2nd week to the end of the 3rd week?
  5. During which week did Plant A grow most?
  6. During which week did Plant B grow least?
  7. Were the two plants of the same height during any week shown here? Specify.

The following table shows the number of patients discharged from a hospital with HIV diagnosis in different years:

Years: 2002 2003 2004 2005 2006
Number of patients: 150 170 195 225 230

Represent this information by a graph.


The following table shows the sales of a commodity during the years 2000 to 2006.

Years: 2000 2001 2002 2003 2004 2005 2006
Sales (in lakhs of Rs): 1.5 1.8 2.4 3.2 5.4 7.8 8.6

Draw a graph of this information.


Draw the temperature-time graph in each of the following cases:

Time (in hours): 8:00 10:00 12:00 14:00 16:00 18:00 20:00
Temperature (°F) in: 100 101 104 103 99 98 100

Draw the velocity-time graph from the following data:

Time (in hours): 7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00
Speed (in km/hr): 30 45 60 50 70 50 40 45

The runs scored by two teams A and B in first 10 overs are given below:

Overs: I II III IV V VI VII VIII IX X
Team A: 2 1 8 9 4 5 6 10 6 2
Team B: 5 6 2 10 5 6 3 4 8 10

Draw a graph depicting the data, making the graphs on the same axes in each case in two different ways as a graph and as a bar chart.


Study the graph and answer the questions that follow.

  1. What information does the graph give?
  2. On which day was the temperature the least?
  3. On which day was the temperature 31°C?
  4. Which was the hottest day?


The following graph shows the number of people present at a certain shop at different times. Observe the graph and answer the following questions.

  1. What type of a graph is this?
  2. What information does the graph give?
  3. What is the busiest time of day at the shop?
  4. How many people enter the shop when it opens?
  5. About how many people are there in the shop at 1:30 pm?

As part of his science project, Prithvi was supposed to record the temperature every hour one Saturday from 6 am to midnight. At noon, he was taking lunch and forgot to record the temperature. At 8:00 pm, his favourite show came on and so forgot again. He recorded the data so collected on a graph sheet as shown below.

  1. Why does it make sense to connect the points in this situation?
  2. Describe the overall trend, or pattern, in the way the temperature changes over the time period shown on the graph.
  3. Estimate the temperature at noon and 8 pm.

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